Buy a Ku band LNB Buy a C band LNB, preferable one like with vertical & horizontal polarities
Cut open C band LNB from top, I did it with the help of saw and then it came out
Open the cap of ku band LNB from bottom
Fit the ku band LNB on the opened top of C band LNB Fit the ku band LNB on the opened top of C band LNB loke shown in picture below and put some leak proof adhesive at the point of contact of both LNBS. REMEMBER to keep the horizontal and vertical pins of both of LNB's aligned at same position.
Connect both the LNBs to a disq switch and fit the C band LNB in Feed Horn of your dish, now you are ready to point to a satellite which is beaming C as well as ku band signals
Bongo, now you can point both signals on one dish.
Only disadvantage I saw is 10% reduction in signal of both types of signal.